- Nagahama, A. Leafing, flowering, and fruiting phenology of tropical montane forests of southern Vietnam. 10th APBON seminar. December 2021.
- Nagahama, A., S. Tagane, N. V. Ngoc, H. T. Binh, Y. Suyama, T. Yahara. Phenology of tropical montane forests in southern Vietnam: leafing is associated with precipitation but flowering is not. Botany 2020 by BSA. Online. July 2020.
- Nagahama, A., S. Tagane, N. V. Ngoc, H. T. Binh, T. Q. Cuong, N. T. A. Thu, K. Tsuchiya, M. Zhang, H. V. Thanh, N. C. Thinh, Y. Suyama, A. Matsuo, S. K. Hirota, E. Moritsuka, H. Toyama, H. Nagamasu, A. Naiki, T. Yahara. Phenology of tropical montane forests in southern Vietnam: leafing is associated with precipitation but flowering is not. Fall Meeting 2019 by AGU. USA, December 2019.
- Nagahama, A. Flowering and fruiting phenology of forest trees in Bidoup-Nui Ba NP. The ecological research of plant diversity and forest ecosystem in Bidoup-Nui Ba National Park and surrounding areas. Vietnam, December 2018.
- Nagahama, A., M. Zhang, M. M. Aung, N. Tanaka, S. Tagane, T. Yahara. Species diversity of upper montane forest of Mt. Victoria, Myanmar. International Symposium. gUpdating of Flora and Fauna of Myanmar", Myanmar, December 2018.
- Tagane, S., A. Nagahama, N. Tanaka, M. M. Aung, M. Zhang, H. Toyama, H. Nagamasu, N. Okabe, A. Naiki, T. Yahara. Plant diversity assessment using a standardized belt-transect method in Myanmar. International Symposium. gUpdating of Flora and Fauna of Myanmar", Myanmar, December 2018.
- Zhang, M., S. Tagane, A. Nagahama, N. Tanaka, T. Yahara, M. M. Aung. Tree species diversity of Taninthayi Nature Reserve in Myanmar. International Symposium. gUpdating of Flora and Fauna of Myanmar", Myanmar, December 2018.
- Kawakubo, A., T. Yahara. Does the Flowering Period Differ between Trees and Herbs?, Phenology Workshop in Fukuoka, Japan, March 2017.
- Kawakubo, A., T. Yahara. Does the Flowering Period Differ between Trees and Herbs? A Test Based on Phylogenetic Relationship, the XIX International Botanical Congress (IBC 2017), China, July 2017.